holley 670

If this is a more race oriented vehicle, then I would change almost everything....almost nothing in your combo matches to make this thing go fast (no offence). As far as the carb, yes it is a little small, and again, if this is race oriented I would have gone with a double pumper for ease of tuning (preferably a 750).

With that said, you will need to tune the carb to get it to work well whether or not it is new or used (I'm assuming used since you traded work for it)...and if it is used you might have even more work ahead of you because who knows what the previous owner did to it.

I would start by going to a test and tune night, getting a base line, then jet for the best MPH. As far as the bog, that would be in your pump cams and shooters more than likely.

Very nice looking truck by the way :-)